The Title of this Curious piece, is _Diatribae Thomae Willisii Med. Doct. & Profess. Oxon. De Febribus Vindicatio, Authore Richardo Lower, &c._ In it are occasionally discussed many considerable Medical and Anatomical inquiries, as, Whether a Fever does consist in an Effervescence of Blood? And if so, of what kind? Whether there be a _Nervous_ and _Nutritious_ Juice? Whether the office of sanguification belongs to the Blood it self, existing _before_ those _Viscera_ (at least) that are commonly esteemed to be the Organs of sanguification? How _Nutrition_ is performed, and the nourishing substance assimilated? Whether the Blood affords both the Matter for the structure of the Body, and such parts also, as are fit for the nourishment of the same? Whether the Pulse of the Heart ceasing, there remains yet a certain Motion in the blood, arguing, that _Pulse_ and _Life_ do ultimately rest in the _Blood_? Whether the Umbilical Vessels convey the blood of the Mother to the Child, or whether the _Foetus_ be for the most part form'd and {78} acted by the circulating blood, before the existence of the Umbilical Vessels, or before the connecting of the _Foetus_ with the _Uterus_? A new Experiment to prove that the _Chyle_ is not transmuted into _Blood_ by the _Liver_. A discourse of the Nature of the _Blood_, and what difference there is between the _Venal_ and _Arterial_ blood, and for what Uses both the one and the other are particularly designed. Where it is considered, what _Life_ is, and whence the _Soul_ of _Brutes_, and its subsistence, and operations do depend. It is also inquired into, what the uses of the _Lungs_ are in _hot_ Animals? And many other such material disquisitions are to be found in this small, but very Ingenious and Learned Treatise. * * * * * _A Note touching a Relation, inserted in the last _Transactions_._ In the Experiment of killing _Ratle-Snakes_, mentioned in the last of the precedent Papers (wherein, by a mistake, these words, _The way_, were put for _A way_, or _An Experiment_) it should have been added, that the Gentleman there mention'd, did affirm, that, in those places, where the Wild _Penny-Royal_ or _Dittany_ grows, no _Ratle-Snakes_ are observed to come. * * * * * _Errata._ Pag. 59. line 11. read, _bignesses_, l. 20. r. _endure_, for, resist. l. 30. r. _those_, for, these. l. 31. r. _Plain_, for, place. * * * * * _LONDON,_ Printed with Licence, By _John Martyn_, and _James Allestry_, Printers to the _Royal-Society_, at the _Bell_ in St. _Pauls Church-Yard_. 1665. {79} * * * * * _Numb._ 5. PHILOSOPHICAL _TRANSACTIONS._ * * * * * _Munday_, _July_ 3. 1665. * * * * * The Contents.